Solution : https://service.sap.com/sap/support/notes/301333 (SAP Service marketplace login required)
Key words :
message n4431 'existing appointment entry, additional key words nr16, time slot entry, visit data screen, visit scheduling, ou & changed', treatment ou, program error, support package 019, support package 002
Related Notes :
| 200200 | IS-H: Active collective note- errors in 4.61A |
| 153153 | IS-H: Composite note on important errors in 4.03A |